研究目的
To present a novel compact wide-band contra-directional single conductor ridge waveguide coupler with 50% fractional bandwidth and equal power split between the through and coupled ports.
研究成果
The novel ridge waveguide contra-directional coupler provides tight 3 dB coupling over a 50% fractional bandwidth and occupies a very compact size, suitable for high power sensing, beam forming, and wide band combining applications.
研究不足
The design's performance is dependent on the careful design of the large coupling window to account for variation in even impedance due to non-zero different cutoff frequencies for the modes.
1：Experimental Design and Method Selection:
The design starts with the coupling section in a modified double ridge waveguide supporting two independent propagating TE modes. Proper cross-section choice achieves required impedance levels for tight coupling.
2：Sample Selection and Data Sources:
An S-band proof of concept prototype was used.
3：List of Experimental Equipment and Materials:
Ridge waveguide coupler, CNC milling for fabrication.
4：Experimental Procedures and Operational Workflow:
The coupler was synthesized, simulated, fabricated, and tested.
5：Data Analysis Methods:
Full-wave optimization process for dimensional parameters to obtain required power split, return loss, and isolation levels.
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